DTC P0410: Secondary Air Injection System: Description

The Secondary Air Injection (AIR) system reduces exhaust emissions after the engine starts. This occurs when the start-up coolant temperature is between 36-104°F (2-40°C) and the Intake Air Temperature (IAT) is more than 33°F (1°C). The PCM activates the AIR system by suppling a ground to the AIR pump relay and the AIR solenoid simultaneously. The AIR solenoid applies engine vacuum to the AIR shut-off valve, opening the valve. The AIR pump forces pressurized fresh air into the pipes/hoses and past the exhaust check valve into the exhaust manifold, accelerating catalyst operation. When the AIR system is inactive, the AIR shut-off valve and the exhaust check valve prevent airflow in either direction. The PCM will run up to 2 diagnostic active tests during the same key cycle, using the HO2S 1 voltage parameter to verify system operation. When the PCM detects an insufficient HO2S 1 response, DTC P0410 sets.